Negative pressure collecting device for silica powder

Abstract

The invention relates to the technical field of silica powder collection, in particular to a silica powder negative pressure collection device which comprises a negative pressure tank and a collection box, and a negative pressure pumping device is arranged on the inner side of the negative pressure tank; the negative pressure pumping device comprises an annular cylinder fixed to the inner side of the negative pressure tank, and a plurality of negative pressure cavities with upper and lower openings are formed in the side wall of the annular cylinder. Through the anti-blocking spring arranged on the inner side of the conveying hose, when high-speed airflow drives silica powder to rapidly flow through the inner side of the conveying hose, the anti-blocking spring can swing in the radial direction under the impact effect of the airflow, the anti-blocking spring drives a plurality of spring sleeves on the outer side to swing in the radial direction, and the silica powder is conveyed to the conveying hose. And each spring sleeve drives a plurality of anti-blocking spikes on the outer side to swing, and when each anti-blocking spike swings, caked silica powder can be crushed, so that the caked silica powder is further prevented from blocking the inner side of the conveying hose, and the use reliability of the device is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of silicon micropowder collection, and in particular to a negative pressure collection device for silicon micropowder. Background Art

[0002] Silicon carbide powder is an engineering processing material for the solar photovoltaic industry, semiconductor industry, and piezoelectric crystal industry. With the development of science and technology, the requirements for new materials are getting higher and higher. Since silicon carbide powder can be recycled and reused, it is necessary to recycle silicon powder through a recycling device.

[0003] After searching, a Chinese patent with publication number: CN208732131U discloses a negative pressure collection device for silicon micropowder, including a collecting tank, on the top of which a cyclone dust collector, a bag dust collector and a tank top dust collector are fixedly installed in sequence, on the top of the tank top dust collector is fixedly installed a mounting block, on the top of the mounting block is fixedly installed a negative pressure fan, on one side of the collecting tank is fixedly installed a support plate, on the top of the support plate are fixedly installed a gasification fan, a support block and a motor in sequence, and on the top of the support block is fixedly installed a feeding pipe.

[0004] Based on the above search and combined with actual problems, it was found that the existing device transports and collects silicon micropowder through the airflow generated by negative pressure. Since the negative pressure cannot change significantly in an instant, the airflow velocity cannot fluctuate significantly. When the transportation distance is long, it is easy to cause blockage in the transportation pipeline. The above-mentioned comparative document transports silicon micropowder through a feeding rod with a threaded flange. Although it can effectively avoid blockage of the transportation pipeline, it greatly reduces the transportation speed, thereby reducing the collection efficiency of silicon micropowder. Summary of the invention

[0005] The object of the present invention is to provide a negative pressure collection device for silicon powder to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a negative pressure collection device for silicon micropowder, comprising a negative pressure tank and a collecting box, wherein a negative pressure pumping device is arranged on the inner side of the negative pressure tank; the negative pressure pumping device comprises an annular cylinder fixed on the inner side of the negative pressure tank, the side wall of the annular cylinder is provided with a plurality of negative pressure chambers with upper and lower openings, an upper blocking block is movably arranged at the inner upper opening of each of the negative pressure chambers, a trigger mechanism is arranged between each of the upper blocking blocks and the annular cylinder for driving each upper blocking block to move up and down in sequence, an exhaust mechanism is connected to the outer side of the annular cylinder, and a lower sealing mechanism is arranged at the lower end of each of the negative pressure chambers; the exhaust mechanism comprises a suction cylinder arranged on the outer side of the negative pressure tank, a slide plate is movably arranged on the inner side of the suction cylinder, and one end of the suction cylinder is connected with an exhaust pipe and an exhaust pipe, and one end of the exhaust pipe is connected with a gas collecting circular shell located on the inner side of the annular cylinder, and the gas collecting circular shell is connected with the inner side of each negative pressure chamber through a plurality of exhaust branch pipes.

[0007] Preferably, the trigger mechanism includes a reduction motor installed on the inner side of the ring cylinder, a fixed block fixed on the upper end of each upper block and a support block fixed on the upper end of the ring cylinder at the position of each upper block, the driving end of the reduction motor is fixed with a rotating shaft, one end of the rotating shaft is fixed with a trigger rod, a guide groove is provided on the upper side of the trigger rod, a positioning hole is provided inside each of the fixed blocks, a fixing pin that is slidably connected to the inner side of the positioning hole is penetrated inside each of the support blocks, and a sliding pin that is slidably connected to the inner side of the guide groove is inserted at one end of each of the fixing pins.

[0008] Preferably, the guide groove includes a first arc groove, two second arc grooves and two oblique arc grooves opened on the upper side of the trigger rod, the two ends of the first arc groove are respectively connected to one end of the two oblique arc grooves, one end of the two second arc grooves are respectively connected to the other end of the two oblique arc grooves, and the diameter of the first arc groove is smaller than the diameter of the second arc groove.

[0009] Preferably, a bracket is fixed on the inner side of each negative pressure chamber, a guide rod inserted through the bracket is fixed on the lower end of each upper block, and the lower end of each upper block is elastically connected to the upper side of the bracket at the corresponding position through a spring.

[0010] Preferably, the vacuum mechanism also includes a negative pressure motor installed at one end of the outer side of the suction cylinder and an internal threaded cylinder fixed on one side of the slide. A screw is fixed to the driving end of the negative pressure motor, and the screw is connected to the inner side of the internal threaded cylinder through threaded rotation. One-way valves are installed on the inner sides of the exhaust pipe and multiple vacuum branch pipes.

[0011] Preferably, a plurality of sleeve rods are fixed to one side of the slide plate, a sliding rod is slidably inserted into one end of each sleeve rod, and one end of each sliding rod is fixedly connected to an inner end of the suction cylinder.

[0012] Preferably, the lower blocking mechanism includes a plurality of cylinders installed at the lower end of the inner side of the negative pressure tank, a bracket is fixed to the telescopic ends of the plurality of cylinders, and a lower blocking block matching with the position of the lower opening of each negative pressure chamber is fixed on the upper side of the bracket.

[0013] Preferably, the lower end of the negative pressure tank is communicated with the interior of the collection box, and the upper end of the negative pressure tank is connected to a delivery hose, and one end of the delivery hose is connected to a feed hopper.

[0014] Preferably, a plurality of spring frames are fixed at equal intervals on the inner side of the delivery hose, an anti-blocking spring is arranged between the plurality of spring frames, a plurality of spring sleeves are arranged at equal intervals on the outer side of the anti-blocking spring, a plurality of anti-blocking spikes arranged in a circumferential manner are fixed on the outer side of the plurality of spring sleeves, and the plurality of spring sleeves are arranged alternately with the plurality of spring frames.

[0015] Preferably, a discharge pipe is provided at the lower side of the collecting box, and a pipe end cap is threadedly mounted at the lower end of the discharge pipe.

[0016] The present invention provides a negative pressure collection device for silicon micropowder by improvement, which has the following improvements and advantages compared with the prior art:

[0017] First, the present invention uses an exhaust mechanism to extract the air in multiple negative pressure chambers of the negative pressure pump suction device to form a negative pressure state inside, and then drives multiple upper blocking blocks to move downward in sequence through a trigger mechanism, so that each negative pressure chamber is connected with the inside of the negative pressure tank in sequence, and the air pressure inside and outside the negative pressure tank is balanced. Therefore, the outside air will quickly flow from the feed hopper into the inner side of the conveying hose under the action of the air pressure difference, and then quickly flow into the inner side of each negative pressure chamber through one end of the conveying hose. The rapidly flowing air can play an impact role, and can quickly convey the silicon micropowder put into the inside of the feed hopper to the inner side of the negative pressure chamber, which not only greatly increases the collection speed of the silicon micropowder and improves the collection efficiency, but also under the impact of the airflow, it can well avoid the blockage of the silicon micropowder on the inner side of the conveying hose, thereby improving the reliability of the device.

[0018] Secondly, the present invention arranges an anti-blocking spring on the inner side of the conveying hose. When the high-speed airflow drives the silicon micropowder to flow quickly through the inner side of the conveying hose, the anti-blocking spring will swing radially under the impact of the airflow. The anti-blocking spring drives multiple spring sleeves on the outside to swing radially. Each spring sleeve drives multiple anti-blocking spikes on the outside to swing. Each anti-blocking spike can crush the agglomerated silicon micropowder when it swings, thereby further avoiding the agglomerated silicon micropowder from being blocked on the inner side of the conveying hose, and further improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the negative pressure tank and the suction cylinder in the present invention;

[0022] Figure 3 It is a cross-sectional structural schematic diagram of the negative pressure pump suction device in the present invention;

[0023] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 5 It is a structural schematic diagram of the negative pressure pump suction device of the present invention in the downward moving state of the upper blocking block;

[0025] Figure 6 It is a schematic diagram of the disassembled structure of the trigger rod in the present invention;

[0026] Figure 7 It is a schematic cross-sectional structural diagram of the delivery hose in the present invention;

[0027] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point B in the middle.

[0028] Reference numerals:

[0029] 1. Negative pressure tank; 2. Collection box; 3. Conveying hose; 4. Feed hopper; 5. Discharge pipe; 6. Pipe end cover; 101. Ring cylinder; 102. Negative pressure chamber; 103. Bracket; 104. Guide rod; 105. Spring; 106. Upper block; 107. Speed ​​reducer motor; 108. Rotating shaft; 109. Trigger rod; 110. Guide groove; 111. Support block; 112. Fixing pin; 113. Sliding pin; 114. Fixing block; 115. Positioning hole; 201. Suction cylinder; 2 ... Piezoelectric motor; 203, screw rod; 204, slide plate; 205, internal threaded cylinder; 206, slide rod; 207, sleeve rod; 208, exhaust pipe; 209, exhaust pipe; 210, gas collecting round shell; 211, exhaust branch pipe; 301, cylinder; 302, bracket; 303, lower blocking block; 401, spring frame; 402, anti-blocking spring; 403, spring sleeve; 404, anti-blocking spikes; 1101, first arc groove; 1102, second arc groove; 1103, oblique arc groove. DETAILED DESCRIPTION

[0030] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a negative pressure collection device for silicon micropowder through improvement. The technical solution of the present invention is:

[0032] like Figures 1 to 8 As shown, an embodiment of the present invention provides a negative pressure collection device for silicon micropowder, comprising a negative pressure tank 1 and a collection box 2, a negative pressure pumping device is arranged on the inner side of the negative pressure tank 1, the lower end of the negative pressure tank 1 is communicated with the inside of the collection box 2, and the upper end of the negative pressure tank 1 is connected with a conveying hose 3, and one end of the conveying hose 3 is connected with a feed hopper 4; the negative pressure pumping device comprises an annular cylinder 101 fixed on the inner side of the negative pressure tank 1, a plurality of negative pressure cavities 102 with upper and lower openings are opened on the side wall of the annular cylinder 101, an upper block 106 is movably arranged at the inner upper opening of each negative pressure cavity 102, and each upper block 106 and the annular cylinder 101 are connected to each other. A trigger mechanism is provided in the middle for driving each upper blocking block 106 to move up and down in sequence, the outer side of the annular tube 101 is connected with an exhaust mechanism, and the lower end of each negative pressure chamber 102 is provided with a lower blocking mechanism; the exhaust mechanism comprises a suction cylinder 201 arranged on the outer side of the negative pressure tank 1, a slide plate 204 is movably provided on the inner side of the suction cylinder 201, and one end of the suction cylinder 201 is connected with an exhaust pipe 208 and an exhaust pipe 209, one end of the exhaust pipe 209 is connected with an air collecting round shell 210 located on the inner side of the annular tube 101, and the air collecting round shell 210 is connected with the inner side of each negative pressure chamber 102 through a plurality of exhaust branch pipes 211.

[0033] Furthermore, the trigger mechanism includes a reduction motor 107 installed on the inner side of the ring tube 101, a fixed block 114 fixed on the upper end of each upper block 106, and a support block 111 fixed on the upper end of the ring tube 101 at the position of each upper block 106. The driving end of the reduction motor 107 is fixed with a rotating shaft 108, one end of the rotating shaft 108 is fixed with a trigger rod 109, and a guide groove 110 is provided on the upper side of the trigger rod 109. A positioning hole 115 is provided inside each fixing block 114, and a sliding connection is penetrated inside each support block 111 to match the inner side of the positioning hole 115. A fixing pin 112, one end of each fixing pin 112 is inserted with a sliding pin 113 slidably connected to the inner side of the guide groove 110, the guide groove 110 includes a first arc groove 1101, two second arc grooves 1102 and two oblique arc grooves 1103, both ends of the first arc groove 1101 are respectively connected to one end of the two oblique arc grooves 1103, one end of the two second arc grooves 1102 is respectively connected to the other end of the two oblique arc grooves 1103, and the diameter of the first arc groove 1101 is smaller than the diameter of the second arc groove 1102;

[0034] The trigger mechanism is used to drive each upper block 106 to move downward and then move upward again to reset, so that each negative pressure chamber 102 can be connected with the inner side of the negative pressure tank 1 in sequence, so that the outside air can flow into the inner side of the conveying hose 3 in sections, achieving a multi-section jet impact effect, further avoiding blockage of the inner side of the conveying hose 3.

[0035] Furthermore, a bracket 103 is fixed to the inner side of each negative pressure chamber 102, a guide rod 104 penetrating and inserted into the inside of the bracket 103 is fixed to the lower end of each upper block 106, and the lower end of each upper block 106 is elastically connected to the upper side of the bracket 103 at the corresponding position through a spring 105;

[0036] The upper blocking block 106 can be moved upward and reset by the spring 105. After the air pressure inside and outside the negative pressure chamber 102 is balanced, the upper opening of the negative pressure chamber 102 can be blocked again to prevent the inhaled silicon powder from floating out again.

[0037] Furthermore, the air extraction mechanism also includes a negative pressure motor 202 installed at one end of the outer side of the suction cylinder 201, and an internal threaded cylinder 205 fixed to one side of the slide plate 204. A screw 203 is fixed to the driving end of the negative pressure motor 202, and the screw 203 is connected to the inner side of the internal threaded cylinder 205 by threaded rotation. A one-way valve is installed on the inner side of the exhaust pipe 208 and multiple air extraction branch pipes 211. Multiple sleeve rods 207 are fixed to one side of the slide plate 204, and a sliding rod 206 is slidably inserted at one end of each sleeve rod 207, and one end of each sliding rod 206 is fixedly connected to one end of the inner side of the suction cylinder 201.

[0038] The air extraction mechanism is used to extract the air in the multiple negative pressure chambers 102 in the negative pressure pumping device, so that the multiple negative pressure chambers 102 form a negative pressure state, thereby facilitating the collection of silicon micropowder.

[0039] Furthermore, the lower blocking mechanism includes a plurality of cylinders 301 installed at the lower end of the inner side of the negative pressure tank 1, a bracket 302 is fixed to the telescopic end of the plurality of cylinders 301, and a lower blocking block 303 adapted thereto is fixed at the upper side of the bracket 302 corresponding to the position of the lower opening of each negative pressure chamber 102;

[0040] After each negative pressure chamber 102 recovers from the negative pressure state to a state of equilibrium with the external air pressure, silicon micropowder is collected on the inside of each negative pressure chamber 102, and then the telescopic ends of the multiple cylinders 301 of the lower sealing mechanism are controlled to retract to drive the bracket 302 to move downward, and the bracket 302 drives the multiple lower blocking blocks 303 on the upper side to move downward and separate from the lower opening of the negative pressure chamber 102, so that the silicon micropowder collected on the inside of each negative pressure chamber 102 falls into the inside of the collection box 2 under the action of gravity, thereby collecting the silicon micropowder on the inside of the collection box 2.

[0041] Further, a plurality of spring frames 401 are fixed at equal intervals on the inner side of the delivery hose 3, an anti-blocking spring 402 is arranged between the plurality of spring frames 401, a plurality of spring sleeves 403 are arranged at equal intervals on the outer side of the anti-blocking spring 402, a plurality of anti-blocking spikes 404 arranged in a circumference are fixed on the outer side of the plurality of spring sleeves 403, and the plurality of spring sleeves 403 are arranged alternately with the plurality of spring frames 401 respectively;

[0042] When the high-speed airflow drives the silicon micropowder to flow quickly through the inner side of the conveying hose 3, the anti-blocking spring 402 will swing radially under the impact of the airflow, and the anti-blocking spring 402 drives the multiple spring sleeves 403 on the outside to swing radially. Each spring sleeve 403 drives the multiple anti-blocking spikes 404 on the outside to swing. Each anti-blocking spike 404 can crush the agglomerated silicon micropowder when swinging, thereby further avoiding the agglomerated silicon micropowder from being blocked on the inner side of the conveying hose 3, and further improving the reliability of the device.

[0043] Furthermore, a discharge pipe 5 is provided at the lower side of the collecting box 2, and a pipe end cap 6 is installed at the lower end of the discharge pipe 5 by means of threads;

[0044] By rotating and removing the tube end cover 6 , the silicon powder inside the collection box 2 can be discharged through the discharge pipe 5 .

[0045] Working principle: When in use, the feed hopper 4 can be moved to any position through the flexible conveying hose 3, and the residual silicon micropowder produced at different positions of the production line can be put into the inner side of the feed hopper 4, and then the device is started to control the telescopic ends of multiple cylinders 301 of the lower blocking mechanism to extend at the same time, driving the bracket 302 to move upward, and the bracket 302 drives the multiple lower blocking blocks 303 on the upper side to move upward, so that each lower blocking block 303 is inserted into the inner side of the lower opening of each negative pressure chamber 102 at the corresponding position, thereby blocking the lower opening of the negative pressure chamber 102, and each upper blocking block 106 is subjected to the elastic force of the spring 105 at the lower end to generate an upward thrust, so that each upper blocking block 106 can be pressed against the upper opening of the negative pressure chamber 102, thereby blocking the upper opening of the negative pressure chamber 102;

[0046] Then the negative pressure motor 202 of the air extraction mechanism drives the screw 203 to rotate, and the screw 203 drives the internal threaded barrel 205 to move through the thread, and the internal threaded barrel 205 first drives the slide plate 204 to move toward the end where the exhaust pipe 208 is located, and the air inside the suction barrel 201 is discharged outward through the exhaust pipe 208. The conduction direction of the one-way valve inside the exhaust pipe 208 points to the outside of the suction barrel 201. When the air in the suction barrel 201 is discharged, the negative pressure motor 202 drives the screw 203 to reverse, thereby driving the internal threaded barrel 205 to reverse, and the internal threaded barrel 205 drives the slide plate 204 to move, so that the slide plate 204 moves toward one end of the suction cylinder 201 close to the negative pressure motor 202, thereby increasing the space of the suction cylinder 201 close to one end of the air extraction pipe 209, thereby forming a negative pressure in the space close to the air extraction pipe 209. Since the conduction direction of the one-way valve inside each air extraction branch pipe 211 points to the inside of the gas collecting round shell 210, the air inside each negative pressure chamber 102 flows into the inside of the gas collecting round shell 210 through a plurality of air extraction branch pipes 211, and then flows into the inside of the suction cylinder 201 of the air extraction mechanism through the air extraction pipe 209, thereby forming a high negative pressure state inside each negative pressure chamber 102.

[0047] Then, the reduction motor 107 of the trigger mechanism is controlled to run and drive the rotating shaft 108 to rotate. The rotating shaft 108 drives the trigger rod 109 and the guide groove 110 at its upper end to rotate at a lower uniform speed. The reduction motor 107 can drive the trigger rod 109 and the guide groove 110 to rotate one circle each time, so that the guide groove 110 on the upper side of the trigger rod 109 can pass through the position of the sliding pin 113 at one end of each fixed pin 112 in sequence. A second arc groove 1102 located at one end of the guide groove 110 first contacts the sliding pin 113. As the trigger rod 109 drives the guide groove 110 to continue to rotate, the sliding pin 113 passes through an oblique arc groove 110 connected to it from the inner side of the second arc groove 1102. 3 slides into the inner side of the first arc groove 1101. Since the diameter of the first arc groove 1101 is smaller than that of the second arc groove 1102, when the sliding pin 113 slides from the second arc groove 1102 into the inner side of the first arc groove 1101, the sliding pin 113 can drive the corresponding fixing pin 112 to slide along the inside of the support block 111, so that one end of the fixing pin 112 extends from the inner side of the corresponding positioning hole 115, thereby releasing the lock of the upper blocking block 106 at this position. Under the action of the pressure difference between the inside and outside of the negative pressure chamber 102, the upper blocking block 106 will move downward quickly and compress the spring 105, thereby connecting the upper opening of the negative pressure chamber 102 with the inner side of the negative pressure tank 1. The inner side of the pressure tank 1 is connected to the outside world through the conveying hose 3. Therefore, the outside air will quickly flow into the inner side of the conveying hose 3 from the feed hopper 4 under the action of the air pressure difference, and then quickly flow into the inner side of the negative pressure chamber 102 through one end of the conveying hose 3. The rapidly flowing air can play an impact role, and can quickly convey the silicon micropowder put into the inner side of the feed hopper 4 to the inner side of the negative pressure chamber 102, which not only greatly increases the collection speed of the silicon micropowder and improves the collection efficiency, but also under the impact of the airflow, it can well avoid the blockage of the silicon micropowder on the inner side of the conveying hose 3, thereby improving the reliability of the device. As the trigger rod 109 and the guide groove 110 continue to rotate, the sliding pin 113 slides from the inner side of the first arc groove 1101 through another oblique arc groove 1103 into the inner side of another second arc groove 1102, thereby pushing the fixing pin 112 to move in the opposite direction. As the outside air quickly flows into the inner side of the negative pressure chamber 102, the pressure inside the negative pressure chamber 102 and the negative pressure tank 1 are balanced again. When the pressure inside and outside the negative pressure chamber 102 is balanced again, the upper block 106 is pushed upward again by the elastic force of the spring 105 to block the negative pressure chamber 102, and the positioning hole 115 is aligned with the fixing pin 112. When the fixing pin 112 moves in the opposite direction, it can be reinserted into the inner side of the positioning hole 115 to lock the upper block 106 again.

[0048] Then the trigger rod 109 drives the guide groove 110 to continue to rotate. According to the above principle, when the trigger rod 109 drives the guide groove 110 to rotate one circle, each fixing pin 112 can be driven to extend from the inner side of each positioning hole 115 and then reinserted, so that each upper block 106 moves down and then moves up again to reset, so that each negative pressure chamber 102 can be connected with the inner side of the negative pressure tank 1 in sequence, so that the outside air can flow into the inner side of the conveying hose 3 in sections, which plays a multi-section jet impact effect, further avoiding the blockage of the inner side of the conveying hose 3, and through multiple jet impacts, a small amount of silicon micropowder adhered to the inner side of the feed hopper 4 and the conveying hose 3 can be fully transported to the inner side of each negative pressure chamber 102, reducing the loss of silicon micropowder during the collection process;

[0049] After the trigger rod 109 and the guide groove 110 rotate one circle, each negative pressure chamber 102 recovers from the negative pressure state to a state of equilibrium with the external air pressure, and then controls the telescopic ends of the multiple cylinders 301 of the lower blocking mechanism to retract and drive the bracket 302 to move downward, and the bracket 302 drives the multiple lower blocking blocks 303 on the upper side to move downward and separate from the lower opening of the negative pressure chamber 102, so that the silicon micropowder collected on the inner side of each negative pressure chamber 102 falls into the inner side of the collection box 2 under the action of gravity, thereby collecting the silicon micropowder on the inner side of the collection box 2, and the silicon micropowder collected on the inner side of the collection box 2 can be unloaded through the discharge pipe 5 by rotating and removing the tube end cover 6;

[0050] It should be noted that, during the operation stage of the negative pressure motor 202 of the vacuum mechanism, each lower block 303 blocks the lower opening of the negative pressure chamber 102, and each upper block 106 blocks the upper opening of the negative pressure chamber 102. The function of the vacuum mechanism is to form a negative pressure in the negative pressure chamber 102 without sucking away the silicon micropowder; and when the upper block 106 moves downward rapidly, the negative pressure motor 202 of the vacuum mechanism stops working, and at this time, the vacuum branch pipe 211 is equivalent to a closed valve state.

[0051] An anti-blocking spring 402 is arranged on the inner side of the conveying hose 3. When the high-speed airflow drives the silicon micropowder to flow quickly through the inner side of the conveying hose 3, the anti-blocking spring 402 will swing radially under the impact of the airflow. The anti-blocking spring 402 drives the multiple spring sleeves 403 on the outside to swing radially. Each spring sleeve 403 drives the multiple anti-blocking spikes 404 on the outside to swing. Each anti-blocking spike 404 can crush the agglomerated silicon micropowder when swinging, thereby further avoiding the agglomerated silicon micropowder from being blocked on the inner side of the conveying hose 3, and further improving the reliability of the device.

[0052] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A negative pressure collection device for silicon micropowder, comprising a negative pressure tank (1) and a collection box (2), characterized in that: A negative pressure pumping device is provided on the inner side of the negative pressure tank (1); The negative pressure pump suction device comprises an annular tube (101) fixed on the inner side of the negative pressure tank (1), the side wall of the annular tube (101) is provided with a plurality of negative pressure chambers (102) with upper and lower openings, an upper block (106) is movably provided at the inner upper opening of each negative pressure chamber (102), a trigger mechanism for driving each upper block (106) to move up and down in sequence is provided between each upper block (106) and the annular tube (101), an air extraction mechanism is connected to the outer side of the annular tube (101), and a lower sealing mechanism is provided at the lower end of each negative pressure chamber (102); The air extraction mechanism comprises a suction cylinder (201) arranged on the outside of the negative pressure tank (1), a slide plate (204) is movably arranged on the inside of the suction cylinder (201), and one end of the suction cylinder (201) is connected to an exhaust pipe (208) and an air extraction pipe (209), and one end of the air extraction pipe (209) is connected to an air collecting round shell (210) located on the inside of the annular cylinder (101), and the air collecting round shell (210) is connected to the inside of each negative pressure chamber (102) through a plurality of air extraction branch pipes (211).

2. The negative pressure collection device for silicon powder according to claim 1, characterized in that: The trigger mechanism comprises a reduction motor (107) installed on the inner side of the annular tube (101), a fixed block (114) fixed on the upper end of each upper block (106), and a support block (111) fixed on the upper end of the annular tube (101) at a position corresponding to each upper block (106); a rotating shaft (108) is fixed on the driving end of the reduction motor (107); a trigger rod (109) is fixed on one end of the rotating shaft (108); a guide groove (110) is arranged on the upper side of the trigger rod (109); a positioning hole (115) is provided inside each of the fixed blocks (114); a fixing pin (112) adapted to the inner side of the positioning hole (115) is slidably connected to the inside of each of the support blocks (111); and a sliding pin (113) slidably connected to the inner side of the guide groove (110) is inserted at one end of each of the fixing pins (112).

3. The negative pressure collection device for silicon powder according to claim 2, characterized in that: The guide groove (110) comprises a first arc groove (1101), two second arc grooves (1102) and two oblique arc grooves (1103) which are opened on the upper side of the trigger rod (109); two ends of the first arc groove (1101) are respectively connected to one end of the two oblique arc grooves (1103); one end of the two second arc grooves (1102) is respectively connected to the other end of the two oblique arc grooves (1103); and the diameter of the first arc groove (1101) is smaller than the diameter of the second arc groove (1102).

4. The negative pressure collection device for silicon powder according to claim 1, characterized in that: A bracket (103) is fixed on the inner side of each negative pressure chamber (102), a guide rod (104) penetrating and inserted into the inside of the bracket (103) is fixed on the lower end of each upper block (106), and the lower end of each upper block (106) is elastically connected to the upper side of the bracket (103) at the corresponding position through a spring (105).

5. The negative pressure collection device for silicon powder according to claim 1, characterized in that: The air extraction mechanism also includes a negative pressure motor (202) installed at one end of the outer side of the suction cylinder (201), and an internal threaded cylinder (205) fixed to one side of the slide plate (204). A screw (203) is fixed to the driving end of the negative pressure motor (202), and the screw (203) is connected to the inner side of the internal threaded cylinder (205) through threaded rotation. The inner sides of the exhaust pipe (208) and the multiple air extraction branch pipes (211) are all installed with a one-way valve.

6. The negative pressure collection device for silicon powder according to claim 5, characterized in that: A plurality of sleeve rods (207) are fixed to one side of the slide plate (204), one end of each sleeve rod (207) is slidably inserted with a slide rod (206), and one end of each slide rod (206) is fixedly connected to an inner end of the suction cylinder (201).

7. The negative pressure collection device for silicon powder according to claim 1, characterized in that: The lower blocking mechanism comprises a plurality of cylinders (301) installed at the lower end of the inner side of the negative pressure tank (1), a bracket (302) being fixed to the telescopic ends of the plurality of cylinders (301), and a lower blocking block (303) matching with the lower opening of each negative pressure chamber (102) being fixed on the upper side of the bracket (302).

8. The negative pressure collection device for silicon powder according to claim 1, characterized in that: The lower end of the negative pressure tank (1) is in communication with the interior of the collection box (2), and the upper end of the negative pressure tank (1) is connected to a delivery hose (3), and one end of the delivery hose (3) is connected to a feed hopper (4).

9. The negative pressure collection device for silicon powder according to claim 8, characterized in that: A plurality of spring frames (401) are fixed at equal intervals on the inner side of the delivery hose (3); an anti-blocking spring (402) is arranged between the plurality of spring frames (401); a plurality of spring sleeves (403) are arranged at equal intervals on the outer side of the anti-blocking spring (402); a plurality of anti-blocking spikes (404) arranged in a circumferential pattern are fixed on the outer side of the plurality of spring sleeves (403); and the plurality of spring sleeves (403) are arranged alternately with the plurality of spring frames (401).

10. The negative pressure collection device for silicon powder according to claim 1, characterized in that: A discharge pipe (5) is provided on the lower side of the collection box (2), and a pipe end cap (6) is threadedly mounted on the lower end of the discharge pipe (5).

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